PCI: pciehp: wait 1000 ms before Link Training check

PCI: pciehp: wait 1000 ms before Link Training check

Orabug:13993738
We need to wait for 1000 ms after Data Link Layer Link Active (DLLLA)
bit reads 1b before sending configuration request. Currently pciehp
does this wait after checking Link Training (LT) bit. But we need it
before checking LT bit because LT is still set even after DLLLA bit is
set on some platforms.

Acked-by: Yinghai Lu <yinghai@kernel.org>
Tested-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
(cherry picked from commit 0027cb3e1947d0f453fece40ed16764fb362bac6)

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>